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            height: 390px;
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        h3 {
            color: white; 
            padding: 10px 25px 5px 35px;
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            height: 333px;
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<body>
    <div class="box">
        <h3>爱宠知识</h3>
        <div class="d1">
            <ul>
                <li>养狗比养猫对健康更有利</li>
                <li>日本正宗柴犬亮相，你怎么看柴犬</li>
                <li>狗狗歌曲《新年旺旺》</li>
                <li>带宠兜风，开车带宠需要注意什么？</li>
                <li>【爆笑】这狗狗太不给力了</li>
                <li>狗狗与男童相同着装拍有爱造型照</li>
                <li>狗狗各个阶段健康大事件</li>
                <li>调皮宠物狗陷在沙发里的搞笑瞬间</li>
                <li>为什么每次大小便后，会用脚踢土？</li>
            </ul>
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